DE102004005992B3 - Manufacturing method for a semiconductor structure - Google Patents
Manufacturing method for a semiconductor structure Download PDFInfo
- Publication number
- DE102004005992B3 DE102004005992B3 DE102004005992A DE102004005992A DE102004005992B3 DE 102004005992 B3 DE102004005992 B3 DE 102004005992B3 DE 102004005992 A DE102004005992 A DE 102004005992A DE 102004005992 A DE102004005992 A DE 102004005992A DE 102004005992 B3 DE102004005992 B3 DE 102004005992B3
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- DE
- Germany
- Prior art keywords
- layer
- gate stacks
- gate
- silicon
- gate dielectric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 12
- 229920005591 polysilicon Polymers 0.000 claims description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 10
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000001039 wet etching Methods 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 7
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000005530 etching Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/4983—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET with a lateral structure, e.g. a Polysilicon gate with a lateral doping variation or with a lateral composition variation or characterised by the sidewalls being composed of conductive, resistive or dielectric material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28247—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon passivation or protection of the electrode, e.g. using re-oxidation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/822—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being a semiconductor, using silicon technology
- H01L21/8232—Field-effect technology
- H01L21/8234—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type
- H01L21/823468—MIS technology, i.e. integration processes of field effect transistors of the conductor-insulator-semiconductor type with a particular manufacturing method of the gate sidewall spacers, e.g. double spacers, particular spacer material or shape
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/6656—Unipolar field-effect transistors with an insulated gate, i.e. MISFET using multiple spacer layers, e.g. multiple sidewall spacers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B99/00—Subject matter not provided for in other groups of this subclass
- H10B99/22—Subject matter not provided for in other groups of this subclass including field-effect components
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
Abstract
Die vorliegende Erfindung schafft ein Herstellungsverfahren für eine Halbleiterstruktur. Das Herstellungsverfahren umfasst die Schritte: Bereitstellen eines Halbleitersubstrats (1) mit einem Gatedielektrikum (5); Bereitstellen einer Mehrzahl von mehrschichtigen länglichen, im Wesentlichen parallel zueinander verlaufenden Gatestapeln (GS1; GS2) auf dem Gatedielektrikum (5), welche eine unterste Schicht (10) aus Silizium aufweisen; Vorsehen einer ersten Linerschicht (60) aus einem ersten Material über den Gatestapeln (GS1, GS2) und dem daneben freiliegenden Gatedielektrikum (5), deren Dicke (h) geringer als eine Dicke (h') der untersten Schicht (10) aus Silizium ist; Vorsehen von Seitenwandspacern (70) aus einem zweiten Material an den vertikalen Flanken der Gatestapel (GS1; GS2) über der ersten Linerschicht (60), wobei ein Bereich der ersten Linerschicht (60) über dem Gatedielektrikum (5) zwischen den Gatestapeln (GS1; GS2) freibleibt; selektives Entfernen der ersten Linerschicht (60) gegenüber den Seitenwandspacern (70) zum lateralen Freilegen der untersten Schicht (10) aus Silizium der Gatestapel (GS1; GS2); und selektives Oxidieren der freigelegten untersten Schicht (10) zum Bilden von Seitenwandoxidbereichen (50') an den Gatestapeln (GS1; GS2).The present invention provides a manufacturing method for a semiconductor structure. The manufacturing method comprises the steps of: providing a semiconductor substrate (1) with a gate dielectric (5); Providing a plurality of multi-layered elongate, substantially parallel gate stacks (GS1; GS2) on the gate dielectric (5) having a lowermost layer (10) of silicon; Providing a first liner layer (60) of a first material over the gate stacks (GS1, GS2) and the adjacent gate dielectric (5) whose thickness (h) is less than a thickness (h ') of the bottommost layer (10) of silicon ; Providing sidewall spacers (70) of a second material on the vertical edges of the gate stacks (GS1, GS2) over the first liner layer (60), a portion of the first liner layer (60) over the gate dielectric (5) between the gate stacks (GS1; GS2) remains free; selectively removing the first liner layer (60) from the sidewall spacers (70) to laterally expose the lowermost silicon layer (10) of the gate stacks (GS1; GS2); and selectively oxidizing the exposed bottom layer (10) to form sidewall oxide regions (50 ') on the gate stacks (GS1; GS2).
Description
Die vorliegende Erfindung betrifft ein Herstellungsverfahren für eine HalbleiterstrukturThe The present invention relates to a manufacturing method for a semiconductor structure
Aus
der US 2003/0141554 A1 und der
Die Gatestapel weisen weiterhin erste und zweite übereinander liegende Seitenwandspacer auf sowie laterale Seitenwandoxidbereiche an den Gatestapeln unterhalb der ersten und zweiten Seitenwandspacer, die sich bis unter die Gatestapel erstrecken.The Gate stacks also have first and second superimposed sidewall spacers on and lateral sidewall oxide areas at the gate stacks below the first and second sidewall spacers extending to below the Gate stack stretch.
Aus
der
Obwohl prinzipiell auf beliebige integrierte Schaltungen anwendbar, werden die vorliegende Erfindung sowie die ihr zugrundeliegende Problematik in bezug auf integrierte Speicherschaltungen in Silizium-Technologie erläutert.Even though in principle be applicable to any integrated circuits the present invention and its underlying problem in relating to integrated memory circuits in silicon technology explained.
In
Mittels
eines üblichen Ätzverfahrens
sind in die Schichtenfolge teilfertige längliche, im wesentlichen parallele
Gatestapel GS1, GS2 geätzt
worden. Dabei ist die unterste Schicht
In
einem darauffolgenden Prozessschritt, der in
Anschließend an
den im
In
einem weiteren Verfahrensschritt erfolgt dann eine selektive Oxidation
der freiliegenden lateralen Oberfläche der untersten Schicht
Problematisch
bei der mit Bezug auf
Der
hohe Übergangswiderstand
rührt von
einem unzureichenden Schutz gegenüber Sauerstoffdiffusion durch
die dünnen
Spacer her, und die Wortleitungs-Bitleitungs-Kurzschlüsse rühren daher,
dass das Polysilizium
Daher ist es Aufgabe der vorliegenden Erfindung, ein Herstellungsverfahren für eine Halbleiterstruktur zu schaffen, bei der die obigen Verkapselungsprobleme beseitigt sind.Therefore It is an object of the present invention, a manufacturing method for one Semiconductor structure to create the above encapsulation problems are eliminated.
Erfindungsgemäß wird dieses Problem durch das in Anspruch 1 angegebene Herstellungsverfahren gelöst.According to the invention this Problem by the manufacturing method specified in claim 1 solved.
Die Vorteile des erfindungsgemäßen Verfahrens liegen insbesondere darin, dass eine effektive Verkapselung erreicht wird.The Advantages of the method according to the invention lie in particular that an effective encapsulation achieved becomes.
In den Unteransprüchen finden sich vorteilhafte Weiterbildungen und Verbesserungen des Gegenstandes der Erfindung.In the dependent claims find advantageous developments and improvements of Subject of the invention.
Gemäss einer bevorzugten Weiterbildung wird nach dem selektiven Oxidieren eine dritte Linerschicht aus dem ersten oder zweiten Material über den Gatestapeln und dem daneben freiliegenden Gatedielektrikum vorgesehen.According to a preferred development, after the selective oxidation, a third liner layer of the first or second material is exposed over the gate stacks and the adjacent one Gate dielectric provided.
Gemäss einer weiteren bevorzugten Weiterbildung ist das zweite Material Siliziumoxid oder dotiertes Polysilizium.According to one Another preferred development is the second material silicon oxide or doped polysilicon.
Gemäss einer weiteren bevorzugten Weiterbildung weisen die Gatestapel eine zweitunterste Schicht aus WN, eine drittunterste Schicht aus W und eine oberste Schicht aus Siliziumnitrid auf.According to one Another preferred embodiment, the gate stacks have a second lowermost layer made of WN, a third lowest layer of W and a top layer made of silicon nitride.
Gemäss einer weiteren bevorzugten Weiterbildung ist das erste Material Siliziumnitrid.According to one Another preferred development is the first material silicon nitride.
Gemäss einer weiteren bevorzugten Weiterbildung geschieht das selektive Entfernen durch eine Nassätzung.According to one Another preferred development is the selective removal by wet etching.
Gemäss einer weiteren bevorzugten Weiterbildung stehen die Seitenwandoxidbereiche an den Gatestapeln nicht in Kontakt mit der zweituntersten Schicht aus WN.According to one Another preferred development are the Seitenwandoxidbereiche at the gate stacks not in contact with the second lowest layer from WN.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und in der nachfolgenden Beschreibung näher erläutert.One embodiment The invention is illustrated in the drawings and in the following Description closer explained.
In den Figuren bezeichnen gleiche Bezugszeichen gleiche oder funktionsgleiche Bestandteile.In the same reference numerals designate the same or functionally identical Ingredients.
Der
Prozesszustand gemäß
Weiter
mit Bezug auf
Anschließend wird über der
resultierenden Struktur eine weitere Linerschicht aus Siliziumoxid, z.B.
TEOS, abgeschieden, die eine Dicke von typischerweise 8 nm aufweist.
Durch eine bekannte anisotrope Spacerätzung wird die Linerschicht
geätzt, um
Seitenwandspacer
In
einem darauffolgenden Prozessschritt, der in
In
einem daran anschließenden
Prozessschritt erfolgt ein selektives Oxidieren der freigelegten
untersten Schicht
Schließlich wird über der
resultierenden Struktur eine weitere Linerschicht
Bei
dem selektiven Ätzprozess
werden aus der Linerschicht
Durch
das Abscheiden der Linerschicht
Obwohl die vorliegende Erfindung vorstehend anhand eines bevorzugten Ausführungsbeispiels beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Art und Weise modifizierbar.Even though the present invention above based on a preferred embodiment It is not limited to this, but in many ways and modifiable.
Insbesondere ist die Auswahl der Schichtmaterialien bzw. Füllmaterialien nur beispielhaft und kann in vielerlei Art variiert werden.Especially is the selection of the layer materials or fillers only by way of example and can be varied in many ways.
- 11
- HalbleitersubstratSemiconductor substrate
- 55
- Gatedielektrikumgate dielectric
- 1010
- Polysiliziumschichtpolysilicon layer
- 1515
- WNschichtWNschicht
- 2020
- WschichtWschicht
- 2525
- Siliziumnitridschichtsilicon nitride
- GS1, GS2GS1, GS2
- Gatestapelgate stack
- 30, 6030 60
- SiN-LinerSiN liner
- h, h', h''H, h ', h' '
- Dickethickness
- 7070
- SiliziumoxidspacerSiliziumoxidspacer
- 60'60 '
- Siliziumnitridspacersilicon nitride spacers
- 50, 50'50, 50 '
- SeitenwandoxidbereicheSeitenwandoxidbereiche
- 7575
- SiliziumoxidlinerSiliziumoxidliner
Claims (7)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004005992A DE102004005992B3 (en) | 2004-02-06 | 2004-02-06 | Manufacturing method for a semiconductor structure |
US11/035,705 US7235447B2 (en) | 2004-02-06 | 2005-01-14 | Fabrication method for a semiconductor structure and corresponding semiconductor structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004005992A DE102004005992B3 (en) | 2004-02-06 | 2004-02-06 | Manufacturing method for a semiconductor structure |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004005992B3 true DE102004005992B3 (en) | 2005-11-17 |
Family
ID=34813175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102004005992A Expired - Fee Related DE102004005992B3 (en) | 2004-02-06 | 2004-02-06 | Manufacturing method for a semiconductor structure |
Country Status (2)
Country | Link |
---|---|
US (1) | US7235447B2 (en) |
DE (1) | DE102004005992B3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7091098B2 (en) * | 2004-04-07 | 2006-08-15 | Taiwan Semiconductor Manufacturing Company, Ltd. | Semiconductor device with spacer having batch and non-batch layers |
KR100948294B1 (en) * | 2007-10-12 | 2010-03-17 | 주식회사 동부하이텍 | Method for manufacturing in Semiconductor device |
CN106298472B (en) * | 2015-05-14 | 2019-01-18 | 旺宏电子股份有限公司 | The forming method of semiconductor structure |
CN113555322B (en) * | 2020-04-23 | 2024-05-14 | 长鑫存储技术有限公司 | Memory forming method and memory |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5202277A (en) * | 1989-12-08 | 1993-04-13 | Matsushita Electric Industrial Co., Ltd. | Method of fabricating a semiconductor device |
US6127711A (en) * | 1997-06-23 | 2000-10-03 | Nec Corporation | Semiconductor device having plural air gaps for decreasing parasitic capacitance |
US20030017686A1 (en) * | 2001-05-23 | 2003-01-23 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating semiconductor device |
US6521963B1 (en) * | 1999-07-16 | 2003-02-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device and method of manufacturing semiconductor device |
US20030141554A1 (en) * | 1999-03-25 | 2003-07-31 | Matsushita Electronics Corporation | Method for fabricating a semiconductor device having contacts self-aligned with a gate electrode thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100374649B1 (en) * | 2001-08-04 | 2003-03-03 | Samsung Electronics Co Ltd | Structure of semiconductor device and manufacturing method thereof |
DE10135870C1 (en) * | 2001-07-24 | 2003-02-20 | Infineon Technologies Ag | Production of an integrated semiconductor circuit comprises depositing layer sequence, anisotropically etching, oxidizing the lowermost layer of the layer sequence, depositing further layer sequence on substrate, and isotropically etching |
-
2004
- 2004-02-06 DE DE102004005992A patent/DE102004005992B3/en not_active Expired - Fee Related
-
2005
- 2005-01-14 US US11/035,705 patent/US7235447B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5202277A (en) * | 1989-12-08 | 1993-04-13 | Matsushita Electric Industrial Co., Ltd. | Method of fabricating a semiconductor device |
US6127711A (en) * | 1997-06-23 | 2000-10-03 | Nec Corporation | Semiconductor device having plural air gaps for decreasing parasitic capacitance |
US20030141554A1 (en) * | 1999-03-25 | 2003-07-31 | Matsushita Electronics Corporation | Method for fabricating a semiconductor device having contacts self-aligned with a gate electrode thereof |
US6521963B1 (en) * | 1999-07-16 | 2003-02-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor device and method of manufacturing semiconductor device |
US20030017686A1 (en) * | 2001-05-23 | 2003-01-23 | Matsushita Electric Industrial Co., Ltd. | Method for fabricating semiconductor device |
Also Published As
Publication number | Publication date |
---|---|
US20050173729A1 (en) | 2005-08-11 |
US7235447B2 (en) | 2007-06-26 |
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